CCC 329

St. Augustine says: "'Angel' is the name of their office, not of their nature. If you seek the name of their nature, it is 'spirit'; if you seek the name of their office, it is 'angel': from what they are, 'spirit', from what they do, 'angel.'"¹⁸⁸ St. Augustine, En. in Ps. 103, 1, 15: PL 37, 1348PL — Patrologia Latina (Migne). With their whole beings the angels are servants and messengers of God. Because they "always behold the face of my Father who is in heaven" they are the "mighty ones who do his word, hearkening to the voice of his word".¹⁸⁹ Mt 18:10; Ps 103:20.